Given the news coming out of federal agencies of stifled staffer communications as well as numerous instances in various Republican-led states of information disappearing from government websites, it is not alarmist to think that information which is currently available may end up disappearing.
If you, as I do, rely on these documents for your work (or whatever), I strongly urge you to download and save this information on your own devices.
I make use of a number of NIH docs, only some of which are easily downloadable as pdfs (which I did); the rest, I screenshot and saved as pdfs. Screenshot-to-pdf isn’t as good as a straight-up pdf doc, but it does allow you to preserve the information.
(I use the free Fireshot add-on, which is really easy to use; there are also others available.)
There are millions of documents which are currently accessible to the public; I dearly hope someone is copying over as many of them as possible.